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OCR B (Salters) F332 Tuesday 4th June 2013 Exam Discussion (Now Closed)

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are there any ones you wanted in particular? cos we got them on the school VLE, i could download the one you wanted onto here if you want?

Can you upload all old legacy papers please? I might have time to o them later on.

Reply 241

nukethemaly

Original post by krisshP

Can you upload all old legacy papers please? I might have time to o them later on.

Are you kidding me? You haven't done them yet?! Each one takes around an hour and 45 minutes!

KIDDDING :biggrin:

Reply 242

Zarah01

Original post by usycool1

You need to divide by ten thousand; not a hundred thousand.

oh yeah >.< silly mistakes, still dont know how to do the q though

Reply 243

Zarah01

Original post by hen4r

That would be so wonderful if you could! Thanks! I'm looking for June 2008 if that's possible :smile:

2848_2008_Summer_answers.pdf

Reply 244

Zarah01

Original post by krisshP

Can you upload all old legacy papers please? I might have time to o them later on.

the papers are on the ocr webage:
http://www.ocr.org.uk/qualifications/as-a-level-gce-chemistry-b-salters-h035-h435/

Reply 245

hen4r

Original post by Zarah01

2848_2008_Summer_answers.pdf

Thank you so much! :smile:

Reply 246

super121

Original post by Zarah01

hey guys, really dreading this exam as i gather most of you are -_-
can someone please help me on a q from the jan 2010 paper?
here's the question:

1f. Scientists monitor the composition of the Earth's atmosphere. They have found that the concentration of carbon dioxide in dry, unpolluted tropospheric air has increased from 300ppm to around 380ppm between 1900 and the present day.
i) Taking the present day value to be 380ppm, calculate the increase in the percentage of carbon dioxide in the air between 1900 and the present day.

I converted the values into percentages so,
380/100000=0.0038% and 300/100000=0.0030%
so the difference between these values is 0.008, therefore 0.008/0.003

but according to the mark scheme its meant to be 0.008/8*10^ -3.
Any help would be appreciated, its only one mark but its really frustrating me. Thanks in advance :smile:

You don't need to divide by 0.003 because they are in percentage, so the answer is just the difference between the two percentages.

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Reply 247

krisshP

In Jan 2013 q4ci and q4d I don't understand how you get the marks scheme answers. Can somebody please explain?

Thanks

Reply 248

nukethemaly

Original post by krisshP

In Jan 2013 q4ci and q4d I don't understand how you get the marks scheme answers. Can somebody please explain?

Thanks

is the answer for 4d thujone?

Reply 249

krisshP

Original post by nukethemaly

is the answer for 4d thujone?

Yeah, but how did you know?

Reply 250

nukethemaly

Original post by krisshP

Yeah, but how did you know?

because it's not an alkene haha

Reply 251

krisshP

Original post by nukethemaly

because it's not an alkene haha

Q4ci?

Reply 252

nukethemaly

Original post by krisshP

In Jan 2013 q4ci and q4d I don't understand how you get the marks scheme answers. Can somebody please explain?

Thanks

and uh give me a second to think about how I can explain 4ci

Reply 253

Aaaaa11111

does anyone have any good notes for F332? i cant find any
much appreciated :smile:

)))

Reply 254

SherlockHolmes

Original post by Aaaaa11111

does anyone have any good notes for F332? i cant find any
much appreciated :smile:

)))

Here are some notes made by the TSR user RebeccaTenney.

Elements from the Sea Notes.docx377.6KB

Polymer Revolution Notes.docx305.5KB

The Atmosphere Notes.docx54.9KB

Reply 255

krisshP

Look at Jan 2013 q5d. Why don't OCR accept frequency, why just energy? They usually accept talking about frequency and energy. What's up with them?

Reply 256

krisshP

Original post by nukethemaly

and uh give me a second to think about how I can explain 4ci

Can you now explain it please?

Reply 257

cheetahs56

Original post by krisshP

Look at Jan 2013 q5d. Why don't OCR accept frequency, why just energy? They usually accept talking about frequency and energy. What's up with them?

Lol it's OCR dude, that's what they do :tongue:

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Reply 258

nukethemaly

Original post by krisshP

Can you now explain it please?

I'm not sure how to! :frown:

You're better off asking someone else how to I'm sorry dude

Reply 259

nukethemaly

Original post by krisshP

Can you now explain it please?

I'm doing the Jan 2013 paper right now, and this is ridiculous, they've literally picked up questions WORD TO WORD, even calculations from the old spec past papers. I'm just sitting here going "are u kidding me"